Lamp base



FIG. 1 is a front elevation view of a lamp base showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left elevation view thereof;

FIG. 6 is a right elevation view thereof;

FIG. 7 is a perspective view thereof, shown in an environment of use; and,

FIG. 8 is a perspective view thereof, shown in an environment of use.

The structural features depicted by broken lines have been shown for the purpose of illustrating portions of the lamp base that form no part of the claimed design. 

CLAIM The ornamental design for a lamp base, as shown and described. 